package com.eshop.inventory.common.util;

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

/**
 * 说明：日期处理
 */
public class DateUtil {

    private final static SimpleDateFormat sdfYear = new SimpleDateFormat("yyyy");
    private final static SimpleDateFormat sdfDay = new SimpleDateFormat("yyyy-MM-dd");
    private final static SimpleDateFormat sdfDays = new SimpleDateFormat("yyyyMMdd");
    private final static SimpleDateFormat sdfTime = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    private final static SimpleDateFormat sdfTimes = new SimpleDateFormat("yyyyMMddHHmmss");

    /**
     * 获取YYYY格式
     *
     * @return
     */
    public static String getSdfTimes() {
        return sdfTimes.format(new Date());
    }

    /**
     * 获取YYYY格式
     *
     * @return
     */
    public static String getYear() {
        return sdfYear.format(new Date());
    }

    /**
     * 获取YYYY-MM-DD格式
     *
     * @return
     */
    public static String getDay() {
        return sdfDay.format(new Date());
    }

    /**
     * 获取YYYY-MM-DD格式
     *
     * @return
     */
    public static Date getDay(Date date) {

        try {
            date = sdfDay.parse(sdfDay.format(date));
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return date;
    }

    /**
     * 获取YYYYMMDD格式
     *
     * @return
     */
    public static String getDays() {
        return sdfDays.format(new Date());
    }

    /**
     * 获取YYYY-MM-DD HH:mm:ss格式
     *
     * @return
     */
    public static String getTime() {
        return sdfTime.format(new Date());
    }

    /**
     * @param s
     * @param e
     * @return boolean
     * @throws
     * @Title: compareDate
     * @Description: TODO(日期比较 ， 如果s > = e 返回true 否则返回false)
     * @author fh
     */
    public static boolean compareDate(String s, String e) {
        if (fomatDate(s) == null || fomatDate(e) == null) {
            return false;
        }
        return fomatDate(s).getTime() >= fomatDate(e).getTime();
    }

    /**
     * 格式化日期
     *
     * @return
     */
    public static Date fomatDate(String date) {
        DateFormat fmt = new SimpleDateFormat("yyyy-MM-dd");
        try {
            return fmt.parse(date);
        } catch (ParseException e) {
            e.printStackTrace();
            return null;
        }
    }

    /**
     * 格式化日期
     *
     * @param date
     * @return
     */
    public static Date fomatDateToSecond(String date) {
        DateFormat fmt = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        try {
            return fmt.parse(date);
        } catch (ParseException e) {
            e.printStackTrace();
            return null;
        }
    }

    /**
     * 校验日期是否合法
     *
     * @return
     */
    public static boolean isValidDate(String s) {
        DateFormat fmt = new SimpleDateFormat("yyyy-MM-dd");
        try {
            fmt.parse(s);
            return true;
        } catch (Exception e) {
            // 如果throw java.text.ParseException或者NullPointerException，就说明格式不对
            return false;
        }
    }

    /**
     * @param startTime
     * @param endTime
     * @return
     */
    public static int getDiffYear(String startTime, String endTime) {
        DateFormat fmt = new SimpleDateFormat("yyyy-MM-dd");
        try {
            //long aa=0;
            int years = (int) (((fmt.parse(endTime).getTime() - fmt.parse(startTime).getTime()) / (1000 * 60 * 60 * 24)) / 365);
            return years;
        } catch (Exception e) {
            // 如果throw java.text.ParseException或者NullPointerException，就说明格式不对
            return 0;
        }
    }

    /**
     * <li>功能描述：时间相减得到天数
     *
     * @param beginDateStr
     * @param endDateStr
     * @return long
     * @author zeryts
     */
    public static long getDaySub(String beginDateStr, String endDateStr) {
        long day = 0;
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
        Date beginDate = null;
        Date endDate = null;

        try {
            beginDate = format.parse(beginDateStr);
            endDate = format.parse(endDateStr);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        day = (endDate.getTime() - beginDate.getTime()) / (24 * 60 * 60 * 1000);
        //System.out.println("相隔的天数="+day);

        return day;
    }

    /**
     * 得到n天之后的日期
     *
     * @param days
     * @return
     */
    public static String getAfterDayDate(String days) {
        int daysInt = Integer.parseInt(days);

        Calendar canlendar = Calendar.getInstance(); // java.util包
        canlendar.add(Calendar.DATE, daysInt); // 日期减 如果不够减会将月变动
        Date date = canlendar.getTime();

        SimpleDateFormat sdfd = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        String dateStr = sdfd.format(date);

        return dateStr;
    }

    public static String getAfterDayDate(Date date, String days) {
        int daysInt = Integer.parseInt(days);

        Calendar canlendar = Calendar.getInstance(); // java.util包
        canlendar.setTime(date);
        canlendar.add(Calendar.DATE, daysInt); // 日期减 如果不够减会将月变动
        date = canlendar.getTime();
        SimpleDateFormat sdfd = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        String dateStr = sdfd.format(date);
        return dateStr;
    }


    /**
     * 得到n天之后是周几
     *
     * @param days
     * @return
     */
    public static String getAfterDayWeek(String days) {
        int daysInt = Integer.parseInt(days);
        Calendar canlendar = Calendar.getInstance(); // java.util包
        canlendar.add(Calendar.DATE, daysInt); // 日期减 如果不够减会将月变动
        Date date = canlendar.getTime();
        SimpleDateFormat sdf = new SimpleDateFormat("E");
        String dateStr = sdf.format(date);
        return dateStr;
    }

    /**
     * 时间显示规则
     *
     * @param startTime
     * @param endTime
     * @return
     */
    public static String getViewTime(Long startTime, Long endTime) {
        String viewTime = "";
        Long timeDifference = endTime - startTime;
        Long day = timeDifference / (24 * 60 * 60 * 1000);
        Long hour = timeDifference / 1000 / 60 / 60;
        Long minutes = timeDifference / 1000 / 60;
        //判断
        if (minutes >= 1 && minutes < 60) {
            viewTime = minutes + "分钟前";
            //1天＜当前时间-发布时间＞1小时，显示：X小时
        } else if (hour < 24 && hour >= 1) {
            viewTime = hour + "小时前";
            //30天＜当前时间-发布时间＞1天，显示：X天
        } else if (day >= 1 && day <= 30) {
            viewTime = day + "天前";
        } else if (minutes < 1) {
            viewTime = "刚刚";
        } else {
            //当前时间-发布时间＞30天，显示30+天
            viewTime = "30+天前";
        }
        return viewTime;
    }

    /**
     * 获取当天零点零分零秒
     *
     * @return
     */
    public static Date getDayZero() {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(new Date());
        calendar.set(Calendar.HOUR_OF_DAY, 0);
        calendar.set(Calendar.MINUTE, 0);
        calendar.set(Calendar.SECOND, 0);
        Date zero = calendar.getTime();
        return zero;
    }

    public static Date getAWeekLater(Date date) {
        Calendar c = Calendar.getInstance();
        //七天后
        c.setTime(date);
        c.add(Calendar.DATE, +7);
        Date day = c.getTime();
        return day;
    }

    /**
     * 获取n年日期
     *
     * @param date
     * @param n
     * @return
     */
    public static Date getYearLater(Date date, Integer n) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        calendar.add(Calendar.YEAR, n);
        date = calendar.getTime();
        return date;
    }


    /**
     * 获取两个日期之间的差值
     *
     * @param startDate
     * @param endDate
     * @return
     */
    public static String getDayTimeDiff(Date startDate, Date endDate) {
        // 获得两个时间的毫秒时间差异
        Long mm = endDate.getTime() - startDate.getTime();
        if (mm <= 0) {
            return "剩余" + 0 + "分钟";
        }
        long nd = 24 * 60 * 60 * 1000;
        long nh = 60 * 60 * 1000;
        long nm = 60 * 1000;
        // 计算差多少天
        long day = mm / nd;
        // 计算差多少小时
        long hour = mm % nd / nh;
        // 计算差多少分钟
        long min = mm % nd % nh / nm;

        if (day != 0) {
            return "剩余" + day + "天";
        } else if (hour != 0) {
            return "剩余" + hour + "小时";
        } else {
            return "剩余" + min + "分钟";
        }
    }
}